Chrétien (Moon)

Named after Henri Chrétien - French mathematician, astronomer (1870-1956).

Chrétien is a lunar crater that is located in the southern hemisphere on the far side from the Earth. It lies due south of the Mare Ingenii, one of the few maria. The crater lies in the midpoint. The most notable feature of this crater is the low albedo interior floor, which has the same darker hue as the Mare Ingenii to the north. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.